This patch adds a new enum value in IceControllerEvent::Type,
that allows an IceController to request a recheck without
any of the predefined event occuring.
This patch is a NOP for BasicIceController.
BUG=webrtc:10647
Change-Id: Idf1d0946480437109ff272946679fef559ca7beb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/161047
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29976}